[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [List Home]
Re: [equinox-dev] receiving a FrameworkEvent.STARTED event?

Hi Tom,

I'm running equinox using the generic OSGi Framework launcher in the IDE but in production I'm using the default equinox launcher.
I think I understood what is happen now. When I set the bundle's startlevel to 1 I got the start event.

So, is there any way to ensure that a bundle will be started after all other bundles be already started other than set this startlevel to a high value?
Is there anyway to know what is the latest startlevel and then listen for STARTLEVEL_CHANGED ?

thanks again,

Cristiano

On 06/07/2016 09:41, Thomas Watson wrote:
It depends on the launcher you are using.  Here I am going to assume you are using the Equinox launcher as-is.  The thing about FrameworkEvent.STARTED is that it is only fired when the framework has reached its "beginning framework start-level" during the call to Framework.start(). By default this is start-level 1.  The Equinox launcher simply uses the default beginning framework start level of 1 when it starts the framework.  Once the framework has been started the Framework.STARTED event is fired.  Then the Equinox launcher proceeds to set the framework start-level to its final start-level (this defaults to 4 for the equinox launcher).  That ends up activating all the other bundles installed in the system when their start-level is met.  The Equinox launcher could have decided to set the configuration of the beginning start-level to the final one of 4 instead of starting the framework using the default beginning framework start-level

Your bundle is activated at start-level 3, this will be well after the Framework.STARTED event was fired.  Similarly the STOPPED events are not fired until the framework start-level has reached zero.  At that time your bundle will have already been de-activated.  When a bundle is de-activated all of its left-over listeners are flushed from the system so the framework does not hold onto stale objects and create a leak.  The only way to see one of the STOPPED events is to implement your own launcher which uses the Framework launching API.

The Equinox launcher could have decided to set the configuration of the beginning start-level to the final one of 4 instead of starting the framework using the default beginning framework start-level of 1 and then later setting the final framework start-level to 4.  That would have allowed your bundle to sometimes see teh STARTED event.  But even then there are times you would not see the event.  For example, if the bundle was installed and started after the framework was already started.

Tom





From:        Cristiano Gavião <cvgaviao@xxxxxxxxx>
To:        Equinox development mailing list <equinox-dev@xxxxxxxxxxx>
Date:        07/06/2016 06:15 AM
Subject:        [equinox-dev] receiving a FrameworkEvent.STARTED event?
Sent by:        equinox-dev-bounces@xxxxxxxxxxx




Hello all,

I'm facing a problem and would like to ask for some information.

I have a bundle whose activator is registering a FrameworkListener inside the start() method. This bundle is set to start at level 3.

frameworkListener = new FrameworkListener() {
            public void frameworkEvent(FrameworkEvent event) {
                if (event.getType() == FrameworkEvent.STARTED) {
                    try {
                        initiateProcess();
                    } catch (Exception e) {
                        logger.error("Failure occurred while executing "
                                + "initial process.");
                    }
                }
            }
pBundleContext.addFrameworkListener(frameworkListener);


When executing that bundle with a OSGi Framework launcher then the unique event being captured is STARTLEVEL_CHANGED. I can't find a way to it to also receive a FrameworkEvent.STARTED.

And I'm not also receiving the FrameworkEvent.STOP after type a close command and leave the session.

Please, could someone explain me what am I missing here?

thanks,

Cristiano
_______________________________________________
equinox-dev mailing list
equinox-dev@xxxxxxxxxxx
To change your delivery options, retrieve your password, or unsubscribe from this list, visit
https://dev.eclipse.org/mailman/listinfo/equinox-dev




_______________________________________________
equinox-dev mailing list
equinox-dev@xxxxxxxxxxx
To change your delivery options, retrieve your password, or unsubscribe from this list, visit
https://dev.eclipse.org/mailman/listinfo/equinox-dev